Half-lives of three of the heaviest isotopes studied in the report, 334Uus, 336Uus, and 337Uus, were predicted to exceed the age of the Earth, which means they could have survived until the present day if they were ever created; three more isotopes are expected to have half-lives of over 80 million years, the half-life of 244Pu (the least stable primordial nuclide), which means that, if ever created in sufficient quantity, they could have survived until the present day.[1]